Brake-shoe.



1.1. KINZER.

BRAKE SHOE.

APPLICATION FILED OCT. 24. I916- Patented Mar. 20, 1917.

WITH I'SES' UNITED STATES PATENT OFFICE.

JOHN JACOB KINZER, OF WILDWOOD, PENNSYLVANIA, ASSIGNOR TO PITTSBU'RG BRAKE SHOE COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENN SYL- VANIA.

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Specification of Letters Patent.

Patented Mar. 20, 1917.

' Application filed October 2 4, 1916. Serial No. 127,364.

To all whom it may concern:

Be it known that I, JOHN JACOB KINZER, a citizen of the United States, and a resident of Wildwood, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Brake-Shoes; and I do hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to brake-shoes and has special reference to what is known as filled shoes by having a composition of metal in the wheel-engaging body, such as is shown and described in my application filed December 30, 1915,.Serial No. 69,377.

In this class of brake-shoes it is desired to overcome the difliculties heretofore experienced in forming a brake-shoe, and to form such a shoe which will be cheap, simple and efiicient in its form to prevent fracture from expansion and contraction of the same when .in use or idle, will have the parts forming its body-engaging portion formed of the same cross-section, and such parts securely held together at all times by the back member or map A further object of the invention is to provide a shoe of this character in which the body and back will retain their shape under all conditions, and provide a body which will be formed of a plurality of parts, securely held together at its sides and ends by the body member or cap.

To these ends my invention consists, generally stated, in the novel arrangement, con struction and combination of parts, as hereinafter more specifically set forth and described and particularly pointed out in the claims.

To enable others skilled in the art to which my invention appertains to construct and use my improved brake-shoe, I will describe the same more fully referring to the accompanying drawing, in which:

Figure 1 is a plan or back view of my improved brake-shoe;

Fig. 2 is a side elevation of the same;

Fig. 3 is a cross-section on the line'3-3, Fig. 2, looking in the direction of the arrows;

Fig. 4 is a like view on the line 44 Fig. 2, looking in the direction of the arrows; and

Fig. 5 is a view of one of the tions reversed.

Like symbols of reference herein indicate like parts in each of the figures of the drawing. 1

As illustrated in the drawing A shows my improved brake-shoe, which comprises the supporting back member .1, body or wheel bearing portion 2, and supporting lug 3 through which the brake-shoe is connected in the usual manner to the ordinary approved brake-head or hanger.

The body or wheel bearing portion 2 is formed of a series of sectional pieces or blocks 4, preferably of a material such as cast iron or fiber, and the fillers i of a body seccomposition of frictional material which is,

well known in the art, thereby forming sections orblocks. These sections or blocks 4 and 4 of different materials, alternate with each other, and the side faces 5 of such blocks 4, which bear against the fillers 4' are tapering inwardly and outwardly from the back wall or strip 1' of the member 1, for the purposes as hereinafter described. The rear of the sections or blocks 4 and fillers 4 has the supporting back member 1 fitting over the same, which member is formed of metal, preferably steel, and is to be ductile for bending, etc. This backmember has the usual short bearing surfaces 7 having recesses 7, which are formed at the ends of the same, and are adapted to abut against bearings on the ends of the brake-shoe or hanger, while the usual central or intermediate bearings on said head or hanger are adapted to abut against such back member on each side of the lug 3. The back mem- Y her 1 is also provided with a surrounding lip or flange 6, which is bent or turned in from the back wall or strip 1' to form the hollow or receptacle portion 6' in the front of said member and the side and end walls on the same,-so that when the sectional body 2 is in place in the receptacle portion 6' on back 1 as hereinafter described, such walls will bear against the end faces 5 on the sections ibo or blocks as well as against the side faces 5 on the end blocks.

The supporting lug 3 can be connected to the shoe A in any suitable manner, and as shown, is formed of metal, such as steel, and is separate from the back wall 1. lhe lug 3 is attached to the back wall 1 of the back member 1 by having its supporting legs or standards 8 passed through slots 2 in such back wall, with the ends 3 of such legs bent under said Wall, and placed within seats 4 in the blocks 4 and fillers 4.

In the formation of my improved brakeshoe A, the back member 1 is cut to shape and size desired, after which it is pressed or stamped to give such member the proper curvature for the same and the blocks 4 and 4 for engaging the wheel and to form the back wall 1, the bearing surfaces 7, the surrounding lip or flange 6. The lip 6 in providing for the'side and end walls on such back member 1 will be formed outwardly flaring when so pressed or stamped. The back wall 1 is also punched to form the slots 2 in such wall.

The sections or blocks 4 are formed and cut to the shape and size desired, and are placed on such back member 1 and spaced between the side and end walls formed by the lip or flange 6 and within the hollow portion 6 on the back member 1 while such back member is suitably supported to form the tapered spaces or openings 4 between the same by the side faces 5 thereon. The lug 8 having been connected to the back wall 1 in the manner above described, the back 1 and'blocks 4 are now supported, in any suitable manner, so that thecomposition of frictional material can be spread over and between the tapered spaces or openings 4 between the blocks 4, and such material will thereby fill such openings. Suitable pressure can now be applied for packing such material in theopenings 4 and to the inner ends of such sections or blocks4while such blocks and such ends of the fillers 4 and back member 1 are securely held in dies or any other suitable means, which will bend the flared lip 6.0n such back against the end faces 5 on the blocks 4 and 4 and against the side faces 5 on the end blocks 4 and thus form the finished brake-shoe. ihcsc blocks 4, and fillers 4' will be held firmly in place in such back member, and between the back wall 1 and lip or flange 6 forming the side and end walls of the mem: ber 1 and within the hollow portion 6' formed by said wall 1 and said flange, such side and end walls being drawn securely against the intermediate blocks 4 and 4, end blocks 4 and thus allowing the back member 1 to form a clamping connection with said blocks and fillers.

It will be evident that the filler blocks or amaze sections can be previously formed to shape and placed between the compressing sections or blocks for being clamped within the back member with such blocks. and said filling material may be plastic, while the material for such filling, blocks and back member can be of any desired kind best suited for the purpose.

Various other modifications and changes in the design and construction of my improved brake-shoe may be resorted to, without departing from the spirit of the invention or sacrificing any of its advantages.

It will also be seen that my improved brake-shoe can be easily and quickly manufactured and assembled for use, While such shoe will also be strong and durable when in use and will be able to withstand knocks or blows of any kind. The shoe will also permit of use until its body is practically worn entirely away, and will have all the substantial. advantages of lightness and capability of use on modern high speed trains and especially with steel cars and high brake pressure. The body of the shoe being formed in sections or blocks will also permit of expansion and contraction of the shoe and thereby prevent the same from breaking through heat and cold conditions in the shoe when in use or idle. The shoe being provided with a sectional body member, it will not become warped or twisted out of curvature by frictional heat, but will stay in full contact with the face of the wheel and consequently give a much higher efiiciency in retarding heavy and high speed trains, while such sectional body also enables material to be used which will be best suited for the wheel upon which it brakes, and which heretofore has been barred from use by its liability to fracture and other causes.

"What I claim as my invention and desire to secure by Letters Patent is 1. A brake-shoe comprising a back mem ber and a body member, said body member composed of a plurality of sections or blocks, and side portions on said back member for being bent against said sections or blocks to hold the same in place.

2. A brake-shoe comprising a back memher and a body member, said body member composed of a plurality of wedge-shaped sections or blocks, and side portions on said back member for being bent against said sections or blocks to hold the same in place.

3. A brake-shoe comprising a back member and a body member composed of a plurality of sections or blocks, and outwardly flared portions on the side of said backmember for being bent against said sections or blocks to hold the same in place.

4. A brake-shoe comprising a back mem ber and a body member composed of a plurality of wedge-shaped sections or blocks, and outwardly flared portions on the side of said back-member for being bent against said sections or blocks to hold the same in place.

5. A brake-shoe comprising a back member and a body member, said body member composed of a plurality of sections or blocks, and lip portions on the side of said back member for being bent against said sections or blocks to hold the same in place.

6. A brake-shoe comprising a back-member and a body-member, said body member composed of a plurality of wedge-shaped sections or blocks, and lip portions on the side of said back member for being bent against said sections or blocks to hold the same in place.

7. A brake-shoe comprising a back member and a body member, said body member composed of a plurality of sections or blocks,-

and outwardly flared portions on the sides and ends of the back memberfor being bent against said sections or blocks to hold the same in place.

8. A brake-shoe comprising a back member and a body member, said body member composed of a plurality of wedge-shaped sections or blocks, and outwardly flared portions on the sides and ends of the back member for being bent against said sections or blocks to hold the same in place.

9. A brake-shoe comprising aback member and a body member, said body member composed of a plurality of sections or blocks, and lip portions on the sides and ends of said back member for being bent against said sections or blocks to hold the same in place.

10. A brake-shoe comprising a back member and a body member, said body member composed of a plurality of wedge-shaped sections or blocks, and lip portions on the sides and ends of said back member for being bent against said sections or blocks to hold the same in place.

11. A brake-shoe comprising a back member and a body member, said body member composed of a plurality of sections or blocks, and an outwardly flared flange surrounding the sides and ends of said back member forbeing bent against said sections or blocks to hold the same in place.

12. A brake-shoe comprising a back member and a body member, said body member composed of a plurality of wedge-shaped sections or blocks, and an outwardly flared flange surrounding the sides and ends of said back member for being bent against said sections or blocks to hold the same in place.

13. A brake-shoe comprising a back member and a body member, said body'member composed" of a plurality of sections or blocks,

14. A brake-shoe comprising a back mem-' ber and a body member, said body member composed of a plurality of wedge-shaped sections or blocks, and a flange-continuously surrounding the sides and ends of said back member for being bent against said sections or blocks to hold the same in place.

15. A brake-shoe comprising a back member and a body memberysaid body member composed of a plurality of sections. or blocks, and an outwardly flared flange continuously surrounding the sides and ends of said back member for being bent against said sections or blocks to hold the same in place.

16. A brake-shoe comprising a back member and a body member, said body member composed of a plurality of wedge-shaped sections or blocks, and an outwardly flared gaging therewith, said member having flange portions thereon for being bent against said body member to hold the parts in place.

18. In a brake-shoe, the combination with the body and wheel bearing portion, of a back member formed of a ductile metal engaging therewith, said member having outwardly flared flange portions thereon for being bent against said body member to hold the parts in place.

19. In a brake-shoe, the combination with the body and wheel bearing portion, of a back member formed of a ductile metal engaging therewith, said member having outwardly flared side flange portions thereon for being bent against said body member to hold the parts in place.

20. In a brake-shoe, the combination with the body and wheel bearing portion, of a back member formed of a ductile metal engaging therewith, said member having outwardly flared end flange portions thereon for being bent against said body member to hold the parts in place.

21. In a brake shoe,.the combination with the body and wheel bearing portion, of a gaging therewith, said member having outwardly flared side and end flange portions thereon for bein bent against said body member to hold 1: e parts in place.

22. In a brake-shoe, the'combination with the body and wheel bearing portion, of a back member engaging therewith, said membackmember formed of a ductile metal enher having flange portions thereon for being bent against said body member to hold the parts in place.

28. In a brake-shoe, the combination with the body and wheel bearing portion, of a back member engaging therewith, said memher having outwardly flared flange portions thereon for being bent against said body member to hold the parts in place.

24.. In a brake-shoe, the combination with the body and wheel bearing portion, of a back member engaging therewith, said member having outwardly flared side flange portions thereon for being bent against said body member to hold the parts in place.

25. In a brake-shoe, the combination with the body and wheel bearing portion, of a back member engaging therewith, said member having outwardly flared end flange portions thereon for being bent against said body member to hold the parts in place.

26. In a brake-shoe, the combination with the body and the wheel bearing portion, of a back member engaging therewith, said member having outwardly flared side and end flange portions thereon for being bent against said body member to hold the parts in place.

In testimony whereof I, the said JOHN Jason KINZER, have hereunto set my hand.

JOHN JACUB KI ZER. Witnesses:

J. N. Cooxn, A. B. ANGNEY. 

